In UVHM, it’s more important to keep your gear at par with your level. The really nice gear you got from killing the Warrior in TVHM, will feel really weak when you get up to 53 - 54. So it will be RNG that decides just how hard it’s going to be. One full playthrough of the main story and all dlc’s should get you to level 72. Once there, you can start the OP runs. Here it will be even more important to level up your gear. That’s the real issue. One Digi Peak run takes somewhere between 45 - 60 minutes. Having to grind for better gear… 
Some help from friends is always nice when you want to speed things up a bit.
You don’t have to level up to OP 8. You don’t even have to do the UVHM. The rewards for getting to level 72 is more skill points to make your char more awesome, and getting gear that is unavailable in TVHM. The reward for getting to OP 8… You get to feel like a real Badass.
Sounds more like ‘forgot to update’.
but some might be good tips.